Implement a Browser Style Selection in Firefox Settings

[Tykero]

A browser style option enables users to choose a Firefox interface (Nova, Proton, Photon) that works best for them. This feature is significantly more aligned with Mozilla's stated user-customization and preference goals than the recent forced 157 update UI change. This will preempt the inevitable issues that will occur when browser.nova.enabled is removed from about:config in a future update.  

[kelimuttu]

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[err2reroor]

about:config

browser.nova.enabled = false

this brings back the pre-nova gui

i think

at least i get square tabs

[dmitryfr]

Rounded tabs were annoying. Pink shade and pink buttons were utterly annoying.

Fixed it with AI, using userChrome.cssand userContent.css

Unfortunately, browser.nova.enabled = false doesn't provide a long-term solution.